Diana Krall, the pianist and singer who is among the most renowned jazz singers today, has postponed her concert Sunday at Easton’s State Theatre, the venue announced Saturday.

Krall has contracted an upper respiratory viral infection that forced the postponement, the theater said in an email.

The venue said news regarding re-scheduling of the show “will be announced as soon as possible,” and asked patrons to hold onto tickets, “as they will remain valid when rescheduled.”

“Your patience and understanding is much appreciated and we wish Diana the best,” the announcement said.

The show would have been just Krall’s second in 22 years in the Lehigh Valley. Krall last appeared in the area at Sands Bethlehem Event Center in 2012. Her last Valley appearance before that was at Lehigh University in 1996.

Krall also canceled her Oct. 9 concert at Warner Theatre in Washington, D.C., with that theater citing “the grave situation with the health of her mother-in-law, Lillian MacManus, and the need for the family to be together.”

No other future dates on the tour have been cancelled, but Krall was scheduled to take a break of almost three weeks after the State Theatre show. The tour resumes Nov. 2 in Reno, Nev.

Krall has sold more than 6 million albums in the United States — she’s the only singer to have eight albums debut at the top of the Billboard Jazz Albums — and won three Grammy Awards.

The tour is supporting her “Turn Up the Quiet” album; part of 21 new shows on the fourth leg of the tour, which already has visited more than 100 cities in Europe and North America.

“Turn Up the Quiet” was her ninth in a row to top Billboard’s Jazz Albums chart.

In 2009, Billboard magazine ranked Krall as the second-biggest jazz artist of the decade.

Since releasing her Grammy-winning album “Quiet Nights” in 2009, the Canadian Krall has performed on four continents, produced Barbra Streisand’s “Love Is the Answer” album, contributed the song “Simple Twist of Fate” to the new charity album “Chimes of Freedom: The Songs of Bob Dylan Honoring 50 Years of Amnesty International” and performed on Paul McCartney’s new album, “Kisses On The Bottom.”

In 2003, Krall married musician Elvis Costello, who ironically in July canceled a European tour because of a cancer diagnosis, but will resume touring with a long-scheduled concert at Sands Bethlehem Event Center with his band The Imposters on Nov. 2.

Fewer than 40 tickets remain for the Sands show, at $63 at www.sandseventcenter.com, the event center box office at 77 Sands Blvd., Bethlehem, www.Ticketmaster.com, all Ticketmaster outlets and 800-745-3000.